package main

import (
	"time"
	"os"
	"fmt"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

type User struct {
	ID        uint      `json:"id"`
	Name      string    `json:"Name"`
	Email     string    `json:"Email"`
	Createdat time.Time `json:"Createdat"`
	Updatedat time.Time `json:"Updatedat"`
}

func main() {
	mydir, err := os.Getwd()
    if err != nil {
    	panic("failed to Getwd")
        fmt.Println(err)
    }
    fmt.Println(mydir)
	db, err := gorm.Open(sqlite.Open(mydir+"/data.sqlite"), &gorm.Config{})
	if err != nil {
		panic("failed to connect database")
	}

	// 迁移 schema
	// db.AutoMigrate(&User{})

	// Create
	var c time.Time = time.Now()
	var u time.Time = time.Now()
	db.Create(&User{Name: "D42", Email: "m@sina.com", Createdat: c, Updatedat: u})

	// Read
	// var product Product
	// db.First(&product, 1) // 根据整形主键查找
	// db.First(&product, "code = ?", "D42") // 查找 code 字段值为 D42 的记录

	// // Update - 将 product 的 price 更新为 200
	// db.Model(&product).Update("Price", 200)
	// // Update - 更新多个字段
	// db.Model(&product).Updates(Product{Price: 200, Code: "F42"}) // 仅更新非零值字段
	// db.Model(&product).Updates(map[string]interface{}{"Price": 200, "Code": "F42"})

	// // Delete - 删除 product
	// db.Delete(&product, 1)
}
